Any undesirable changes in the physical, chemical or biological characteristics of any component of environment i.e. air, water and soil – which can cause harmful effects on various form of life or property are called environmental pollution.
Any favorable unpolluted environment has pertains a specific composition in their component i.e. air, water and soil.
The problem like pollution come into existence due to short-term economic gain over long-term ecological benefits for humanity.
During last few decades we have contaminated badly on air, water and land on which life itself depends with a variety of waste products.
Be the part of Solution , not the part of Pollution…
We can survive without food for a few days, without water for few hours but without air it is impossible to survive for few min.
An average human require about 12 Kg of their each day which is nearly 12 – 15 times greater than the amount of food we eat.
- Air pollution
- Water pollution
- Soil pollution
- Marine pollution
- Noise pollution
- Thermal pollution
- Nuclear hazard
Air pollution started from very beginning of human evolution. Hippocrates had mentioned air pollution in 400 BC.
- Any undesirable changes in physical, chemical or biological characteristics of any component of the in air which can cause harmful effect on living things is called Air pollution.
- Earlier the air pollution is caused only by burning of fire word as a means of cooking and heating.
- With the industrial revolution the problem become more serious due to cold burning in the industries and development of Transportation system leads to large amount of petrol and diesel was started utilising in the beginning of 20th century.
- Severe air quality problem due to diesel and petrol engines were felt for the first time in Los Angeles in1943.
- The gaseous pollutants include oxides of sulphur, oxides of Nitrogen, carbon monoxide, volatile organic compound, Ozone etc.
- Particulate pollutants includes smoke, soot, fumes, aerosoles, liquid droplets, Pollen Grain etc.
- Radioactive pollutants include Radon222 , Iodine 131, Strontium 19 plutonium 239 etc.
Greatest industrial disaster leading to serious air pollution took place in Bhopal were extremely poisonous methyl isocyanide gas was accidentally released from union carbide pesticides manufacturing plant on the night of 3rd December 1984, the effect of this disaster on human health and the soil are felt even today.
Now we know this tragedy as Bhopal gas tragedy.
The London smog was the major disasters were recorded in 1952 which cause more than 8000 deaths due to accumulation of air pollutants over the city for 5 days.
Primary pollutants – primary pollutants are emitted directly from the point source (natural or human activities).
- Five primary pollutants together constitute 90% of the Global air pollution
- Carbon dioxide
- Carbon monoxide
- Sulphur oxide
- volatile organic compound mostly hydrocarbon
- suspended particulate matter
Secondary pollutants – secondary pollutants formed by the interaction of primary pollutants. example – peroxyacetyl nitrate, smog, Ozone, sulfuric acid, nitric acid, carbonic acid etc.
Indoor air pollution
Many people spend large portion of their time in inside the homes as much as 80% of their life.
We work study, eat, drink, sleep in enclosed environment whereas circulation may be restricted.
- Children and Womens are more exposed to rest in indoor air pollution
- Burning of dung cake , wood, kerosene for fuel.
- Cigarette smoke
- Incomplete combustion produce carbon monoxide that are injurious to health.
- Chemical fumes from paint and solvents
- Chemicals released from Modern building and Furnishing material
Effects of air pollution
- Human health
Control of air pollution
- Reduce energy uses
- Remove pollutant generating stuff
- Check the generation of pollutant where burned
- Putting catalytic converter in automobiles.
- Protect the object from pollutants
- Coat statues with protective material.
- Constructing walking and bicycle lanes
- Encourage mass transportation